Cotton gin



Aug. 18, 1936. w. H. DODSON COTTON GIN Filed Sept. 27, 1934 value.

Patented Au 18, 1936 PATENT OFFICE COTTON GIN William H. Dodson,Torreon, Mexico, assignor to The Murray Company, Dallas, Tex., acorporation of Texas Application September 27, 1934, Serial No. 745,704

3 Claims.

One object of the invention is to provide an improved cotton gin of thepneumatic type involving certain features making for a more efficient,more accessible, and less expensive ginning structure, requiring lesspower to operate and producing a smoother and moreuniform deposit of thelint in the bale, as well as giving the finished cotton a better gradeand a higher A particular object of the invention is to provide a newarrangement of the lint conductor in the gin stand, whereby the tortuousor upwardcurve of the present lint conductor is elimi-. nated and astraight flaring conductor extend-- ing substantially tangentially tothe upright portion of the conductor is substituted for the curvedconductor.

A further object of the invention is to provide a flaring connectionbetween the flaring end of the lint conductor and the lint flue, so thatthe conductor and the connection coacting tend to induce the internalfrictional distance to the discharge of the lint, whereby less airvelocity or pressure is required, thus permitting the use of smallerfans and a reduction in the power required to operate, as well astending to reduce back pressure.

An important object of the invention is to so arrange the lint conductorin the gin stand that the line flue and the transition connecting theconductor and the flue may be located below the floor on which the ginstand is mounted, whereby the floor space behind the gin is unobstructedand enabling the operator to have free access to the back of the ginstand for cleaning and other purposes without climbing over the usuallint flue and other obstructions.

A construction designed to carry out the invention will be hereinafterdescribed, together with other features of the invention.

The invention will be more readily understood from a reading of thefollowing specification and by reference to the accompanying drawing, inwhich an example of the invention is shown, and wherein:

Figure 1 is a transverse vertical sectional view showing a portion ofthe pneumatic gin stand now in common use and the lint flue connectedtherewith, and

Figure 2 is a transverse vertical sectional view showing a portion of agin stand having a lint passage connected with the lint flue, arrangedunder the floor and constructed in accordance with the invention. I

In the drawing the numeral l designates an ordinary pneumatic gin standof a construction now in common use, as shown in Figure 1. The stand isprovided with an air flue H for s'upplying air under pressure and thisflue is connected with an air chamber l2-from which the usual air ductl3 curves upwardly to the nozzle M. The saws l5 project into the upperend of the lint conductor or duct l6 so that the air discharged from thenozzle will blow the lint ed the teeth down into the duct. This duct isgiven a slight flare downwardly and is curved around and under the ductI3 and the flue ll. The discharge portion of the duct curves upwardly,as is shown in Figure 1, and is connected by means of a transition I!with the lint flue Hi.

It will be observed that the lint duct 16 curv- 20 ing upwardly requiressuflicient air velocity to lift the lint after it has passed the bottomor dip X in said duct. In order to keep the lint in suspension, it isnecessary to drag it along the topwall Y of the duct, and this increasesthe resistance. Further, the lint must be lifted through the transitionH to the flue l8. It often becomes necessary for the operator to get tothe back of the gin stand and he is compelled to climb over the flue l8and stand at one side of the transition H.

The improved structure is shown in Figure 2 and resides in straighteningand lowering the lower portion of the duct l6, whereby a rectilinearflaring discharge conductor I9 extends 5 downwardly and tangentiallyfrom the upright portion of the duct I 6. This eliminates a largeportion of the curvature, as well as the upward direction of thecurvature and gives the lint-the advantage of gravity in its downwardpassage. The flare of the conductor l9 permits the lint to remain insuspension without undue resistance from frictional contact with thewalls of said conductor. The conductor extends below the floor A, onwhich the gin stand is mounted. The discharge end of the conductor isconnected with a transition 20, which is also mounted under the floor.This transition is connected with a cylindrical spout 2| of a lint flue23.

It will be noted that the transition, the spout and the lint flue areall below the floor and that both the transition and the spout are givena downward inclination so that the lint starting down the conductor I9has a straight downward passage of constantly increasing area until itreaches the large spout 2| This certainly makes for a more efllcientoperation and reduces the power necessary to operate. The lint is lesslikely to become matted and a better grade is produced. The clearing ofthe floorspace in back of the gin is an important feature. A comparisonof Figs. 1 and 2 will demonstrate how the lint flue obstructs the backofthe gin and how its disposition under the floor removes all obstructionto the back of the gin and gives ready access thereto. 1

What I claim and desire to secure by Letters Patent is:

1. A cotton gin including, in combination with .the floor of a ginhouse, a gin stand mounted on the floor, a lint duct extendingtransversely and downwardly in the gin stand to and through the floor,said duct having a continuous fall, whereby the frictional resistance tothe downwardly moving cotton is reduced, 2. flaring transition connectedto and extending from the lower end of the lint duct below said floorand relatively to the rear of said gin stand, and a lint flue connectedto the outer discharge end of the transition and extending at an anglethereto below the floor, whereby the floor immediately in rear of thegin stand is unobstructed, the lint from the gin stand being conductedin a continuous downward direction, whereby frictional resistance isreduced and the air suction load is lowered.

2. A cotton gin including, in combination with the floor of a gin house,a pneumatic gin stand adapted to form one of a battery of gin standsmounted on the floor, a lint duct curved downwardly and transversely inthe gin stand to and nected to the outer discharge end of the transitionand extending at an angle thereto below the floor, whereby the floorimmediately in rear of the gin stand is unobstructed, the lint from thegin stand being conducted in a continuous downward direction, wherebyfrictional resistance is reduced and the air suction load is lowered.

3. A cotton gin including, in combination with the floor of a gin house,a gin stand mounted on the floor of the gin house, a lint duct extendindownwardly of the gin stand to and through the floor. a flue connectionextending from the discharge end of the lint duct, and a longitudinallint flue located beneath the floor in rear of the gin stand andconnected with the duct by said connection, whereby the floor in rear ofthe gin stand is unobstructed, the lint from the gin stand beingconducted downwardly to the lint flue below the said gin stand and(along said flue,

whereby the air and lint from above are dis- 30' WILLIAM H. DODSON.

